Diopter refers to the curvature of the lens. As the diopter increases, the lens becomes thicker and the curvature greater. As the curvature increases, light rays are redirected to fill a greater portion of the viewer’s retina which makes the object look bigger.

Magnification refers to how much larger an object is made to look through a magnifying lens. Magnification is typically indicated by an X such 2X or 4X.

To calculate the Magnification use the common formula:Divide the Diopter by 4 and add 1.